Evaluate the following expressions if a = 2, b = 3, x = 4, and y = 5.
b^2+3(2x-y)

Hi there! Hopefully this helps!

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First we need to substitute the value of the variable into the expression.

= .

Now we need to solve .

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First, calculate 3 to the power of 2 and get 9.

Multiply 2 and 4 to get 8.

Subtract 5 from 8 to get 3.    

Multiply 3 and 3 to get 9.

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sounds & other waves originate from any vibrating object

the answer is:

the correct option is the option b.

to calculate the surface area of the right cylinder, we need to use the following formula:

from the picture we know that:

so, substituting and calculting we have:

hence, we have that the correct option is the option b.

have a nice day!